To determine the mirror image of the word "LEFT", consider a vertical mirror placed on the right side of the word. In a mirror image, the order of letters reverses and each letter is flipped horizontally.
Original word:
\[
\text{L \quad E \quad F \quad T}
\]
Mirror image will reverse the order and horizontally flip each letter:
Reversed order:
\[
\text{T \quad F \quad E \quad L}
\]
Now flip each character as it appears in a mirror:
T remains T (symmetrical)
F becomes a reversed F
E becomes a reversed E
L becomes a reversed L
Thus, the correct mirror image is:
\[
\reflectbox{T} \reflectbox{F} E \reflectbox{L}
\]
Option (A) shows this correctly.